Storing TT on Dirt Ground

I went to home depot and bought some 12 x 12 concert pads about 4 inches thick. made my self a level parking spot for the TT. had to do some digging to make them half way level but it works for me. just laid them head to head in a straight line and stacked a few on the back end so when I look in the mirror and back up I hit the blocks that tells me to stop going back. I hit my spot pretty regular now.

I've been parking mine on a gravel pad with wood planks under the wheels for many years. Haven't had a flat spot or premature wear yet.

Don't jack it...you risk tweeking/twisting and damaging the frame.
Park it in gravel or on a couple of stepping stone concrete squares or even on a couple of Lynx Levelers. The goal is to get it up out of standing water.
Keep the tires inflated and maybe treat them with 303 Protectant.
Also if lots of sun exposure, cover them.